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animated-hover" onclick="switchNightMode()" title="浅色和深色模式转换" id="nightmode-button"><svg class="faa-tada" style="height:25px;width:25px;fill:currentColor;position:relative;top:7px" viewBox="0 0 1024 1024"><use id="modeicon" xlink:href="#icon-moon">       </use></svg></a><div id="toggle-menu"><a><i class="fas fa-bars fa-fw"></i></a></div></div></div></nav><div id="post-info"><h1 class="post-title">GPIO</h1><div id="post-meta"><div class="meta-firstline"><span class="post-meta-date"><svg class="meta_icon post-meta-icon" style="width:30px;height:30px;position:relative;top:10px"><use xlink:href="#icon-rili"></use></svg><span class="post-meta-label">发表于 </span><time class="post-meta-date-created" datetime="2023-08-18T11:55:23.000Z" title="发表于 2023-08-18 19:55:23">2023-08-18</time><span class="post-meta-separator">|</span><svg class="meta_icon post-meta-icon" style="width:18px;height:18px;position:relative;top:5px"><use xlink:href="#icon-gengxin1"></use></svg><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2023-08-18T12:12:29.967Z" title="更新于 2023-08-18 20:12:29">2023-08-18</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><svg class="meta_icon post-meta-icon" style="width:18px;height:18px;position:relative;top:5px"><use xlink:href="#icon-biaoqian"></use></svg><a class="post-meta-categories" href="/categories/%E5%B5%8C%E5%85%A5%E5%BC%8F/">嵌入式</a></span></div><div class="meta-secondline"><span class="post-meta-separator">|</span><span class="post-meta-wordcount"><svg class="meta_icon post-meta-icon" style="width:25px;height:25px;position:relative;top:8px"><use xlink:href="#icon-charuword"></use></svg><span class="post-meta-label">字数总计:</span><span class="word-count">2373</span><span class="post-meta-separator">|</span><svg class="meta_icon post-meta-icon" style="width:20px;height:20px;position:relative;top:5px"><use xlink:href="#icon-shizhong"></use></svg><span class="post-meta-label">阅读时长:</span><span>10分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv" id="" data-flag-title="GPIO"><svg class="meta_icon post-meta-icon" style="width:25px;height:25px;position:relative;top:5px"><use xlink:href="#icon-eye"></use></svg><span class="post-meta-label">阅读量:</span><span id="busuanzi_value_page_pv"><i class="fa-solid fa-spinner fa-spin"></i></span></span></div></div></div><section class="main-hero-waves-area waves-area"><svg class="waves-svg" xmlns="http://www.w3.org/2000/svg" xlink="http://www.w3.org/1999/xlink" viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto"><defs><path id="gentle-wave" d="M -160 44 c 30 0 58 -18 88 -18 s 58 18 88 18 s 58 -18 88 -18 s 58 18 88 18 v 44 h -352 Z"></path></defs><g class="parallax"><use href="#gentle-wave" x="48" y="0"></use><use href="#gentle-wave" x="48" y="3"></use><use href="#gentle-wave" x="48" y="5"></use><use href="#gentle-wave" x="48" y="7"></use></g></svg></section></header><main class="layout" id="content-inner"><div id="post"><article class="post-content" id="article-container"><h1>GPIO</h1>
<h3 id="工作模式">工作模式</h3>
<h4 id="1-四种输入模式">1.四种输入模式</h4>
<p>（1）GPIO_Mode_IN_FLOATING 浮空输入（即不连接内部上下拉电阻）</p>
<p>（2）GPIO_Mode_IPU 上拉输入</p>
<p>（3）GPIO_Mode_IPD 下拉输入</p>
<p>（4）GPIO_Mode_AIN 模拟输入</p>
<h4 id="2-四种输出模式">2.四种输出模式</h4>
<p>（1）GPIO_Mode_Out_OD 开漏输出（带上拉或者下拉）</p>
<p>（2）GPIO_Mode_AF_OD 复用开漏输出（带上拉或者下拉）</p>
<p>（3）GPIO_Mode_Out_PP 推挽输出（带上拉或者下拉）</p>
<p>（4）GPIO_Mode_AF_PP 复用推挽输出（带上拉或者下拉）</p>
<h4 id="3-四种最大输出速度">3.四种最大输出速度</h4>
<p>（1）2MHZ (低速)</p>
<p>（2）25MHZ (中速)</p>
<p>（3）50MHZ (快速)</p>
<p>（4）100MHZ (高速)</p>
<h3 id="详细分析"><strong>详细分析</strong></h3>
<p><strong>输出配置</strong></p>
<p>对 I/O 端口进行编程作为输出时：</p>
<ul>
<li>输出缓冲器被打开：</li>
</ul>
<p>–开漏模式：输出寄存器中的“0”可激活 N-MOS，而输出寄存器中的“1”会使端 口保持高组态 (Hi-Z)（P-MOS 始终不激活）。</p>
<p>–推挽模式：输出寄存器中的“0”可激活 N-MOS，而输出寄存器中的“1”可激活P-MOS。</p>
<ul>
<li>施密特触发器输入被打开</li>
<li>根据 GPIOx_PUPDR 寄存器中的值决定是否打开弱上拉电阻和下拉电阻</li>
<li>输入数据寄存器每隔 1 个 AHB1 时钟周期对 I/O 引脚上的数据进行一次采样</li>
<li>对输入数据寄存器的读访问可获取 I/O 状态</li>
<li>对输出数据寄存器的读访问可获取最后的写入值</li>
</ul>
<p><img src= "" data-lazy-src="https://s1.vika.cn/space/2023/08/18/1b08d7f0be7c4816a4e3377cf07862de" alt="image-20230818192725344"></p>
<p>推挽电路（push-pull）就是两个不同极性晶体管间连接的输出电路。推挽电路采用两个参数相同的功率BJT管或MOSFET管，以推挽方式存在于电路中，各负责正负半周的波形放大任务，电路工作时，两只对称的功率开关管每次只有一个导通，所以导通损耗小效率高。推挽输出既可以向负载灌电流，也可以从负载抽取电流。</p>
<p>在电路设计中，推挽输出是一种很常用的输出模式。推挽输出有很多优点，比如更低的损耗，更安全的输出等。推挽”之意，即为当一个管子推出去时，另一个管子拉回来。输入不同，交替导通。</p>
<p>举个例子</p>
<ul>
<li>当输入信号为高电平的时候，上面的管子导通，下面的管子截止，输出信号为高电平。</li>
<li>当输入信号为低电平的时候，上面的管子截止，下面的管子导通，输出信号为低电平。</li>
</ul>
<p>MOS管</p>
<p>N型mos比P型mos管使用的多</p>
<p>N型mos管比P型mos管的开关速度快（工艺的影响 ），所以Pmos开关损耗多，发热严重</p>
<p>Nmos比Pmos耐压高</p>
<p>Nmos通过电流能力比较大，因此常用于推挽电路的下管。</p>
<p><strong>输入配置</strong></p>
<p>对 I/O 端口进行编程作为输入时：</p>
<ul>
<li>输出缓冲器被关闭</li>
<li>施密特触发器输入被打开</li>
<li>根据 GPIOx_PUPDR 寄存器中的值决定是否打开上拉和下拉电阻</li>
<li>输入数据寄存器每隔 1 个 AHB1 时钟周期对 I/O 引脚上的数据进行一次采样</li>
<li>对输入数据寄存器的读访问可获取 I/O 状态</li>
</ul>
<p><img src= "" data-lazy-src="https://s1.vika.cn/space/2023/08/18/58a3ba11fdbe458b8c9e43d99ff4380f" alt="image-20230818192855289"></p>
<p><strong>复用功能配置</strong></p>
<p>对 I/O 端口进行编程作为复用功能时：</p>
<ul>
<li>可将输出缓冲器配置为开漏或推挽</li>
<li>输出缓冲器由来自外设的信号驱动（发送器使能和数据）</li>
<li>施密特触发器输入被打开</li>
<li>根据 GPIOx_PUPDR 寄存器中的值决定是否打开上拉电阻和下拉电阻</li>
<li>输入数据寄存器每隔 1 个 AHB1 时钟周期对 I/O 引脚上的数据进行一次采样</li>
<li>对输入数据寄存器的读访问可获取 I/O 状态</li>
</ul>
<p><img src= "" data-lazy-src="https://s1.vika.cn/space/2023/08/18/2d5c5f8ac1674809933f66294d26bc39" alt="image-20230818192938681"></p>
<p><strong>模拟配置</strong></p>
<p>对 I/O 端口进行编程作为模拟配置时：</p>
<ul>
<li>输出缓冲器被禁止。</li>
<li>施密特触发器输入停用，I/O 引脚的每个模拟输入的功耗变为零。施密特触发器的输出被 强制处理为恒定值 (0)。</li>
<li>弱上拉和下拉电阻被关闭。</li>
<li>对输入数据寄存器的读访问值为“0”。</li>
</ul>
<p>在模拟配置中，I/O 引脚不能为 5 V 容忍</p>
<p><img src= "" data-lazy-src="https://s1.vika.cn/space/2023/08/18/c5e7703526f94f48a511425dae16117c" alt="image-20230818193011056"></p>
<h3 id="库函数参考">库函数参考</h3>
<h4 id="1-库函数源码">1.库函数源码</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line">===============================================================================</span><br><span class="line">                     ##### How to use this driver #####</span><br><span class="line">===============================================================================       </span><br><span class="line">[..]             </span><br><span class="line">  (#) Enable the GPIO AHB clock using the following function</span><br><span class="line">      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOx, ENABLE);</span><br><span class="line">              </span><br><span class="line">  (#) Configure the GPIO <span class="title function_">pin</span><span class="params">(s)</span> using <span class="title function_">GPIO_Init</span><span class="params">()</span></span><br><span class="line">      Four possible configuration are available <span class="keyword">for</span> each pin:</span><br><span class="line">      <span class="params">(++)</span> Input: Floating, Pull-up, Pull-down.</span><br><span class="line">      <span class="params">(++)</span> Output: Push-<span class="title function_">Pull</span> <span class="params">(Pull-up, Pull-down or no Pull)</span></span><br><span class="line">           Open <span class="title function_">Drain</span> <span class="params">(Pull-up, Pull-down or no Pull)</span>. In output mode, the speed </span><br><span class="line">           is configurable: 2 MHz, 25 MHz, 50 MHz or 100 MHz.</span><br><span class="line">      <span class="params">(++)</span> Alternate Function: Push-<span class="title function_">Pull</span> <span class="params">(Pull-up, Pull-down or no Pull)</span> Open </span><br><span class="line">           <span class="title function_">Drain</span> <span class="params">(Pull-up, Pull-down or no Pull)</span>.</span><br><span class="line">      <span class="params">(++)</span> Analog: required mode when a pin is to be used as ADC channel or DAC </span><br><span class="line">           output.</span><br><span class="line">  </span><br><span class="line">  <span class="params">(#)</span> Peripherals alternate function:</span><br><span class="line">      <span class="params">(++)</span> For ADC and DAC, configure the desired pin in analog mode using </span><br><span class="line">           GPIO_InitStruct-&gt;GPIO_Mode = GPIO_Mode_AN;</span><br><span class="line">           (+++) For other <span class="title function_">peripherals</span> <span class="params">(TIM, USART...)</span>:</span><br><span class="line">           <span class="params">(+++)</span> Connect the pin to the desired peripherals&#x27; Alternate </span><br><span class="line">                    <span class="title function_">Function</span> <span class="params">(AF)</span> using <span class="title function_">GPIO_PinAFConfig</span><span class="params">()</span> <span class="title function_">function</span></span><br><span class="line">           <span class="params">(+++)</span> Configure the desired pin in alternate function mode using</span><br><span class="line">                    GPIO_InitStruct-&gt;GPIO_Mode = GPIO_Mode_AF</span><br><span class="line">           (+++) Select the type, pull-up/pull-down and output speed via </span><br><span class="line">                    GPIO_PuPd, GPIO_OType and GPIO_Speed <span class="title function_">members</span></span><br><span class="line">           <span class="params">(+++)</span> Call <span class="title function_">GPIO_Init</span><span class="params">()</span> <span class="title function_">function</span></span><br><span class="line">         </span><br><span class="line">  <span class="params">(#)</span> To get the level of a pin configured in input mode use <span class="title function_">GPIO_ReadInputDataBit</span><span class="params">()</span></span><br><span class="line">           </span><br><span class="line">  <span class="params">(#)</span> To <span class="built_in">set</span>/reset the level of a pin configured in output mode use </span><br><span class="line">      <span class="title function_">GPIO_SetBits</span><span class="params">()</span>/<span class="title function_">GPIO_ResetBits</span><span class="params">()</span></span><br><span class="line">                </span><br><span class="line">  <span class="params">(#)</span> During and just after reset, the alternate functions are not </span><br><span class="line">      active and the GPIO pins are configured in input floating <span class="title function_">mode</span> <span class="params">(except JTAG</span></span><br><span class="line"><span class="params">      pins)</span>.</span><br><span class="line"> </span><br><span class="line">  <span class="params">(#)</span> The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general <span class="title function_">purpose</span> </span><br><span class="line">      <span class="params">(PC14 and PC15, respectively)</span> when the LSE oscillator is off. The LSE has </span><br><span class="line">      priority over the GPIO function.</span><br><span class="line"> </span><br><span class="line">  <span class="params">(#)</span> The HSE oscillator pins OSC_IN/OSC_OUT can be used as </span><br><span class="line">      general purpose PH0 and PH1, respectively, when the HSE oscillator is off. </span><br><span class="line">      The HSE has priority over the GPIO function.</span><br></pre></td></tr></table></figure>
<h4 id="2-帮助文档">2.帮助文档</h4>
<p><img src= "" data-lazy-src="C:%5CUsers%5C12984%5CAppData%5CRoaming%5CTypora%5Ctypora-user-images%5Cimage-20230818193347326.png" alt="image-20230818193347326"></p>
<h3 id="函数接口">函数接口</h3>
<h4 id="1-端口硬件时钟使能">1.端口硬件时钟使能</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment">  * @brief  Enables or disables the AHB1 peripheral clock.</span></span><br><span class="line"><span class="comment">  * @note   After reset, the peripheral clock (used for registers read/write access)</span></span><br><span class="line"><span class="comment">  *         is disabled and the application software has to enable this clock before </span></span><br><span class="line"><span class="comment">  *         using it.   </span></span><br><span class="line"><span class="comment">  * @param  RCC_AHBPeriph: specifies the AHB1 peripheral to gates its clock.</span></span><br><span class="line"><span class="comment">  *          This parameter can be any combination of the following values:</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOA:       GPIOA clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOB:       GPIOB clock </span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOC:       GPIOC clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOD:       GPIOD clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOE:       GPIOE clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOF:       GPIOF clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOG:       GPIOG clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOG:       GPIOG clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOI:       GPIOI clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOJ:       GPIOJ clock (STM32F42xxx/43xxx devices) </span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_GPIOK:       GPIOK clock (STM32F42xxx/43xxx devices)  </span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_CRC:         CRC clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_BKPSRAM:     BKPSRAM interface clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_CCMDATARAMEN CCM data RAM interface clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_DMA1:        DMA1 clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_DMA2:        DMA2 clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_DMA2D:       DMA2D clock (STM32F429xx/439xx devices)  </span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_ETH_MAC:     Ethernet MAC clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_ETH_MAC_Tx:  Ethernet Transmission clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_ETH_MAC_Rx:  Ethernet Reception clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_ETH_MAC_PTP: Ethernet PTP clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_OTG_HS:      USB OTG HS clock</span></span><br><span class="line"><span class="comment">  *            @arg RCC_AHB1Periph_OTG_HS_ULPI: USB OTG HS ULPI clock</span></span><br><span class="line"><span class="comment">  * @param  NewState: new state of the specified peripheral clock.</span></span><br><span class="line"><span class="comment">  *          This parameter can be: ENABLE or DISABLE.</span></span><br><span class="line"><span class="comment">  * @retval None</span></span><br><span class="line"><span class="comment">  */</span></span><br><span class="line">  <span class="comment">//时钟使能函数</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">RCC_AHB1PeriphClockCmd</span><span class="params">(<span class="type">uint32_t</span> RCC_AHB1Periph, FunctionalState NewState)</span></span><br></pre></td></tr></table></figure>
<h4 id="2-GPIO的初始化">2.GPIO的初始化</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment">  * @brief  Initializes the GPIOx peripheral according to the specified parameters in the GPIO_InitStruct.</span></span><br><span class="line"><span class="comment">  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices</span></span><br><span class="line"><span class="comment">  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.</span></span><br><span class="line"><span class="comment">  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices.   </span></span><br><span class="line"><span class="comment">  * @param  GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that contains</span></span><br><span class="line"><span class="comment">  *         the configuration information for the specified GPIO peripheral.</span></span><br><span class="line"><span class="comment">  * @retval None</span></span><br><span class="line"><span class="comment">  */</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">GPIO_Init</span><span class="params">(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)</span></span><br></pre></td></tr></table></figure>
<h4 id="3-GPIO结构体初始化">3.GPIO结构体初始化</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/** </span></span><br><span class="line"><span class="comment">  * @brief   GPIO Init structure definition  </span></span><br><span class="line"><span class="comment">  */</span> </span><br><span class="line"><span class="keyword">typedef</span> <span class="class"><span class="keyword">struct</span></span></span><br><span class="line"><span class="class">&#123;</span></span><br><span class="line">  <span class="type">uint32_t</span> GPIO_Pin;              <span class="comment">/*!&lt; Specifies the GPIO pins to be configured.</span></span><br><span class="line"><span class="comment">                                       This parameter can be any value of @ref GPIO_pins_define */</span></span><br><span class="line"></span><br><span class="line">  GPIOMode_TypeDef GPIO_Mode;     <span class="comment">/*!&lt; Specifies the operating mode for the selected pins.</span></span><br><span class="line"><span class="comment">                                       This parameter can be a value of @ref GPIOMode_TypeDef */</span></span><br><span class="line"></span><br><span class="line">  GPIOSpeed_TypeDef GPIO_Speed;   <span class="comment">/*!&lt; Specifies the speed for the selected pins.</span></span><br><span class="line"><span class="comment">                                       This parameter can be a value of @ref GPIOSpeed_TypeDef */</span></span><br><span class="line"></span><br><span class="line">  GPIOOType_TypeDef GPIO_OType;   <span class="comment">/*!&lt; Specifies the operating output type for the selected pins.</span></span><br><span class="line"><span class="comment">                                       This parameter can be a value of @ref GPIOOType_TypeDef */</span></span><br><span class="line"></span><br><span class="line">  GPIOPuPd_TypeDef GPIO_PuPd;     <span class="comment">/*!&lt; Specifies the operating Pull-up/Pull down for the selected pins.</span></span><br><span class="line"><span class="comment">                                       This parameter can be a value of @ref GPIOPuPd_TypeDef */</span></span><br><span class="line">&#125;GPIO_InitTypeDef;</span><br></pre></td></tr></table></figure>
<h4 id="4-GPIO引脚电平设置">4.GPIO引脚电平设置</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment">  * @brief  Sets the selected data port bits.</span></span><br><span class="line"><span class="comment">  * @note   This functions uses GPIOx_BSRR register to allow atomic read/modify </span></span><br><span class="line"><span class="comment">  *         accesses. In this way, there is no risk of an IRQ occurring between</span></span><br><span class="line"><span class="comment">  *         the read and the modify access.</span></span><br><span class="line"><span class="comment">  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices</span></span><br><span class="line"><span class="comment">  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.</span></span><br><span class="line"><span class="comment">  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </span></span><br><span class="line"><span class="comment">  * @param  GPIO_Pin: specifies the port bits to be written.</span></span><br><span class="line"><span class="comment">  *          This parameter can be any combination of GPIO_Pin_x where x can be (0..15).</span></span><br><span class="line"><span class="comment">  * @retval None</span></span><br><span class="line"><span class="comment">  */</span></span><br><span class="line">  <span class="comment">//高电平设置</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">GPIO_SetBits</span><span class="params">(GPIO_TypeDef* GPIOx, <span class="type">uint16_t</span> GPIO_Pin)</span></span><br><span class="line"></span><br><span class="line"><span class="comment">//低电平设置</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">GPIO_ResetBits</span><span class="params">(GPIO_TypeDef* GPIOx, <span class="type">uint16_t</span> GPIO_Pin)</span></span><br></pre></td></tr></table></figure>
<h4 id="读取指定引脚电平">读取指定引脚电平</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment">  * @brief  Reads the specified input port pin.</span></span><br><span class="line"><span class="comment">  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices</span></span><br><span class="line"><span class="comment">  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.</span></span><br><span class="line"><span class="comment">  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </span></span><br><span class="line"><span class="comment">  * @param  GPIO_Pin: specifies the port bit to read.</span></span><br><span class="line"><span class="comment">  *         This parameter can be GPIO_Pin_x where x can be (0..15).</span></span><br><span class="line"><span class="comment">  * @retval The input port pin value.</span></span><br><span class="line"><span class="comment">  */</span></span><br><span class="line"><span class="type">uint8_t</span> <span class="title function_">GPIO_ReadInputDataBit</span><span class="params">(GPIO_TypeDef* GPIOx, <span class="type">uint16_t</span> GPIO_Pin)</span></span><br></pre></td></tr></table></figure>
<h3 id="作业">作业</h3>
<h4 id="【流水灯-跑马灯】">【流水灯/跑马灯】</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//调用GPIO配置结构体</span></span><br><span class="line">GPIO_InitTypeDef GPIO_Initstructure;</span><br><span class="line"><span class="comment">//设置延时</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">delay</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">	<span class="type">uint32_t</span> num=<span class="number">0x200000</span>;</span><br><span class="line">	<span class="keyword">while</span>(num--);</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">(<span class="type">void</span>)</span>	</span><br><span class="line">&#123;</span><br><span class="line">	</span><br><span class="line">	<span class="comment">//LED</span></span><br><span class="line">	<span class="comment">//使能GPIOF</span></span><br><span class="line">	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);</span><br><span class="line">	</span><br><span class="line">	<span class="comment">//使能端口PF9和PF10</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;</span><br><span class="line">	<span class="comment">//设置输出模式</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Mode = GPIO_Mode_OUT;</span><br><span class="line">	<span class="comment">//设置推挽输出</span></span><br><span class="line">	GPIO_Initstructure.GPIO_OType = GPIO_OType_PP;</span><br><span class="line">	<span class="comment">//设置上拉电阻</span></span><br><span class="line">	GPIO_Initstructure.GPIO_PuPd =	GPIO_PuPd_UP;</span><br><span class="line">	<span class="comment">//设置端口高速频率</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Speed = GPIO_Speed_100MHz;</span><br><span class="line"></span><br><span class="line">	<span class="comment">//初始化端口</span></span><br><span class="line">	GPIO_Init(GPIOF,&amp;GPIO_Initstructure);</span><br><span class="line">	</span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;	</span><br><span class="line">		<span class="comment">//led低电平点亮</span></span><br><span class="line">		GPIO_ResetBits(GPIOF,GPIO_Pin_9);</span><br><span class="line">		delay();</span><br><span class="line">		<span class="comment">//高电平熄灭</span></span><br><span class="line">		GPIO_SetBits(GPIOF,GPIO_Pin_9);</span><br><span class="line">		delay();</span><br><span class="line">		GPIO_ResetBits(GPIOF,GPIO_Pin_10);</span><br><span class="line">		delay();</span><br><span class="line">		GPIO_SetBits(GPIOF,GPIO_Pin_10);</span><br><span class="line">		delay();</span><br><span class="line">	</span><br><span class="line">	&#125;</span><br><span class="line">	</span><br></pre></td></tr></table></figure>
<h4 id="【按键控制灯的亮与灭】">【按键控制灯的亮与灭】</h4>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="keyword">include</span><span class="string">&lt;stm32f4xx.h&gt;</span></span></span><br><span class="line">GPIO_InitTypeDef GPIO_Initstructure;</span><br><span class="line"></span><br><span class="line"><span class="type">void</span> <span class="title function_">delay</span><span class="params">(<span class="type">void</span>)</span></span><br><span class="line">&#123;</span><br><span class="line">	<span class="type">uint32_t</span> num=<span class="number">0x200000</span>;</span><br><span class="line">	<span class="keyword">while</span>(num--);</span><br><span class="line"></span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">(<span class="type">void</span>)</span>	</span><br><span class="line">&#123;</span><br><span class="line">	</span><br><span class="line">	<span class="comment">//LED</span></span><br><span class="line">	<span class="comment">//使能GPIOF</span></span><br><span class="line">	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);</span><br><span class="line">	<span class="comment">//使能端口PF9和PF10</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;</span><br><span class="line">	<span class="comment">//设置输出模式</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Mode = GPIO_Mode_OUT;</span><br><span class="line">	<span class="comment">//设置推挽输出</span></span><br><span class="line">	GPIO_Initstructure.GPIO_OType = GPIO_OType_PP;</span><br><span class="line">	<span class="comment">//设置上拉电阻</span></span><br><span class="line">	GPIO_Initstructure.GPIO_PuPd =	GPIO_PuPd_UP;</span><br><span class="line">	<span class="comment">//设置端口高速频率</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Speed = GPIO_Speed_100MHz;</span><br><span class="line">	<span class="comment">//初始化端口</span></span><br><span class="line">	GPIO_Init(GPIOF,&amp;GPIO_Initstructure);</span><br><span class="line">	<span class="comment">//KEY</span></span><br><span class="line">	<span class="comment">//PE4:KEY0   PE3:KEY1</span></span><br><span class="line">	<span class="comment">//使能GPIOE</span></span><br><span class="line">	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE,ENABLE);</span><br><span class="line">	<span class="comment">//使能PE4和PE3</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_3;</span><br><span class="line">	<span class="comment">//设置输出模式</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Mode = GPIO_Mode_IN;</span><br><span class="line">	<span class="comment">//设置电阻上拉</span></span><br><span class="line">	GPIO_Initstructure.GPIO_PuPd = GPIO_PuPd_UP;</span><br><span class="line">	<span class="comment">//设置端口高速频率</span></span><br><span class="line">	GPIO_Initstructure.GPIO_Speed = GPIO_Speed_100MHz;</span><br><span class="line">	<span class="comment">//初始化端口</span></span><br><span class="line">	GPIO_Init(GPIOE,&amp;GPIO_Initstructure);</span><br><span class="line"></span><br><span class="line">	<span class="keyword">while</span>(<span class="number">1</span>)</span><br><span class="line">	&#123;	</span><br><span class="line">		<span class="comment">//检测引脚电平状态</span></span><br><span class="line">		<span class="keyword">if</span>(Bit_RESET == GPIO_ReadInputDataBit(GPIOE,GPIO_Pin_3))</span><br><span class="line">		&#123;</span><br><span class="line">			<span class="comment">//LED1低电平点亮</span></span><br><span class="line">			GPIO_ResetBits(GPIOF,GPIO_Pin_9);</span><br><span class="line">		&#125;<span class="keyword">else</span></span><br><span class="line">		&#123;</span><br><span class="line">			<span class="comment">//熄灭</span></span><br><span class="line">			GPIO_SetBits(GPIOF,GPIO_Pin_9);</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="keyword">if</span>(Bit_RESET == GPIO_ReadInputDataBit(GPIOE,GPIO_Pin_4))</span><br><span class="line">		&#123;</span><br><span class="line">			GPIO_ResetBits(GPIOF,GPIO_Pin_10);</span><br><span class="line">		&#125;<span class="keyword">else</span>&#123;</span><br><span class="line">		</span><br><span class="line">			GPIO_SetBits(GPIOF,GPIO_Pin_10);</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br></pre></td></tr></table></figure>
</article><div class="post-copyright"><div class="post-copyright__title"><span class="post-copyright-info"><h>GPIO</h></span></div><div class="post-copyright__type"><span class="post-copyright-info"><a href="https://certainly.gitee.io/posts/8ce33965.html">https://certainly.gitee.io/posts/8ce33965.html</a></span></div><div class="post-copyright-m"><div class="post-copyright-m-info"><div class="post-copyright-a"><h>作者</h><div class="post-copyright-cc-info"><h>Certainly</h></div></div><div class="post-copyright-c"><h>发布于</h><div class="post-copyright-cc-info"><h>2023-08-18</h></div></div><div class="post-copyright-u"><h>更新于</h><div class="post-copyright-cc-info"><h>2023-08-18</h></div></div><div class="post-copyright-c"><h>许可协议</h><div class="post-copyright-cc-info"><a class="icon" rel="noopener" target="_blank" title="Creative Commons" href="https://creativecommons.org/"><i class="fab fa-creative-commons"></i></a><a rel="noopener" target="_blank" title="CC BY-NC-SA 4.0" 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style="width:22px;height:22px;position:relative;top:5px"><use xlink:href="#icon-mulu1"></use></svg><span style="font-weight:bold">目录</span><span class="toc-percentage"></span></div><div class="toc-content"><ol class="toc"><li class="toc-item toc-level-1"><a class="toc-link"><span class="toc-text">GPIO</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%B7%A5%E4%BD%9C%E6%A8%A1%E5%BC%8F"><span class="toc-text">工作模式</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#1-%E5%9B%9B%E7%A7%8D%E8%BE%93%E5%85%A5%E6%A8%A1%E5%BC%8F"><span class="toc-text">1.四种输入模式</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#2-%E5%9B%9B%E7%A7%8D%E8%BE%93%E5%87%BA%E6%A8%A1%E5%BC%8F"><span class="toc-text">2.四种输出模式</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#3-%E5%9B%9B%E7%A7%8D%E6%9C%80%E5%A4%A7%E8%BE%93%E5%87%BA%E9%80%9F%E5%BA%A6"><span class="toc-text">3.四种最大输出速度</span></a></li></ol></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E8%AF%A6%E7%BB%86%E5%88%86%E6%9E%90"><span class="toc-text">详细分析</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%BA%93%E5%87%BD%E6%95%B0%E5%8F%82%E8%80%83"><span class="toc-text">库函数参考</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#1-%E5%BA%93%E5%87%BD%E6%95%B0%E6%BA%90%E7%A0%81"><span class="toc-text">1.库函数源码</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#2-%E5%B8%AE%E5%8A%A9%E6%96%87%E6%A1%A3"><span class="toc-text">2.帮助文档</span></a></li></ol></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%87%BD%E6%95%B0%E6%8E%A5%E5%8F%A3"><span class="toc-text">函数接口</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#1-%E7%AB%AF%E5%8F%A3%E7%A1%AC%E4%BB%B6%E6%97%B6%E9%92%9F%E4%BD%BF%E8%83%BD"><span class="toc-text">1.端口硬件时钟使能</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#2-GPIO%E7%9A%84%E5%88%9D%E5%A7%8B%E5%8C%96"><span class="toc-text">2.GPIO的初始化</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#3-GPIO%E7%BB%93%E6%9E%84%E4%BD%93%E5%88%9D%E5%A7%8B%E5%8C%96"><span class="toc-text">3.GPIO结构体初始化</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#4-GPIO%E5%BC%95%E8%84%9A%E7%94%B5%E5%B9%B3%E8%AE%BE%E7%BD%AE"><span class="toc-text">4.GPIO引脚电平设置</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#%E8%AF%BB%E5%8F%96%E6%8C%87%E5%AE%9A%E5%BC%95%E8%84%9A%E7%94%B5%E5%B9%B3"><span class="toc-text">读取指定引脚电平</span></a></li></ol></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E4%BD%9C%E4%B8%9A"><span class="toc-text">作业</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#%E3%80%90%E6%B5%81%E6%B0%B4%E7%81%AF-%E8%B7%91%E9%A9%AC%E7%81%AF%E3%80%91"><span class="toc-text">【流水灯&#x2F;跑马灯】</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#%E3%80%90%E6%8C%89%E9%94%AE%E6%8E%A7%E5%88%B6%E7%81%AF%E7%9A%84%E4%BA%AE%E4%B8%8E%E7%81%AD%E3%80%91"><span class="toc-text">【按键控制灯的亮与灭】</span></a></li></ol></li></ol></li></ol></li></ol></div></div></div></div></main><footer id="footer" style="background-color: transparent;"><div id="footer-wrap"><div id="ft"><div class="ft-item-1"><div class="t-top"><div class="t-t-l"><p class="ft-t t-l-t">格言🧬</p><div class="bg-ad"><div>再看看那个光点，它就在这里，这是家园，这是我们 —— 你所爱的每一个人，你认识的一个人，你听说过的每一个人，曾经有过的每一个人，都在它上面度过他们的一生✨</div><div class="btn-xz-box"><a class="btn-xz" target="_blank" rel="noopener" href="https://stellarium.org/">点击开启星辰之旅</a></div></div></div><div class="t-t-r"><p class="ft-t t-l-t">猜你想看💡</p><ul class="ft-links"><li><a href="/posts/eec9786.html">魔改指南</a><a href="/box/nav/">网址导航</a></li><li><a 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